Electronics Handbook/Devices/Filter/Band Pass Filter

Characteristics

 * $$\frac{V_o}{V_i} = (\frac{1}{1 + j\omega \frac{L}{R}}) (\frac{j\omega RC}{1 + j\omega RC}) $$

Band Pass or band of frequencies that has a stable voltage
 * $$\frac{R}{L} - \frac{1}{RC}$$ provided that $$\frac{1}{RC} > \frac{R}{L} $$

Characteristics

 * $$\frac{V_o}{V_i} = (\frac{1}{1 + j\omega RC}) (\frac{j\omega \frac{L}{R}}{1 + j\omega \frac{L}{R}}) $$

Band Pass or band of frequencies that has a stable voltage
 * $$\frac{1}{RC} - \frac{R}{L} $$ provided that $$\frac{R}{L} > \frac{1}{RC}   $$

Summary
The two configurations above can be used to construct Band Pass Filter which has stable frequency over a range of frequencies w1 - w2